18995319

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{281}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 33433920

約数和(自身を除く): 14438601

約数列:

[1, 3, 7, 9, 21, 29, 37, 63, 87, 111, 203, 259, 261, 281, 333, 609, 777, 843, 1073, 1827, 1967, 2331, 2529, 3219, 5901, 7511, 8149, 9657, 10397, 17703, 22533, 24447, 31191, 57043, 67599, 72779, 73341, 93573, 171129, 218337, 301513, 513387, 655011, 904539, 2110591, 2713617, 6331773, 18995319]

約数ペア:

[(1, 18995319), (3, 6331773), (7, 2713617), (9, 2110591), (21, 904539), (29, 655011), (37, 513387), (63, 301513), (87, 218337), (111, 171129), (203, 93573), (259, 73341), (261, 72779), (281, 67599), (333, 57043), (609, 31191), (777, 24447), (843, 22533), (1073, 17703), (1827, 10397), (1967, 9657), (2331, 8149), (2529, 7511), (3219, 5901)]